例句與造句

1. Finally , the results are compared with periodic and random chains . then we studied acoustic wave propagation in 1d quasiperiodic and aperiodic systems by means of he transfer matrix . transmission rate , reflection rate , energy flow , logarithmic energy flow , energy density and lyapunov exponent are computed numerically , and compared with periodic and random system
   其次研究了聲波在幾種一維準(zhǔn)周期和非周期系統(tǒng)中的傳播，通過轉(zhuǎn)移矩陣的方法，數(shù)值地得到了系統(tǒng)的傳播系數(shù)t _ n 、反射系數(shù)r _ n 、能流密度j _ n ，能量密度e _ n和lyapunov指數(shù)，給出了以上各量與傳播長度n以及頻率之間的關(guān)系，同時發(fā)現(xiàn)能流及能量密度都具有分形結(jié)構(gòu)，并與周期和隨機(jī)系統(tǒng)的結(jié)果作了比較。
2. It's difficult to find random chain in a sentence. 用random chain造句挺難的